If the funds were completely opt-outable, would you change your mind?
It is possible yet unlikely. I got to thinking a bit after a brief exchange with Sam awhile back and decided the federal government of Atlasia makes a habit of tackling some issues better left to the individual regions. That's not to imply I am about to go libertarian on ya'll, but I
am going to start dragging my heels when I think this highest tier of government is not doing something imperative to fulfilling its core function of upholding the social rights of the people.
In this case, regulating late-term abortions is consistent with that mission of state. The funding in question, in contrast, has a more diffuse yet nonetheless significant cultural impact. Each region ought to generate strategies of their own, with those policies representing both the values and social mores of their respective peoples better than would a one-size-fits-all approach - in effect addressing the issue in a more decentralized, culturally sensitive manner.
Even if a region could opt out, its taxpayers would still have to fund this in the other regions.